Improvement in pumps



R. M. LAFFERTY.

lmprovemnt'in Pumps.

Patented May 28,1872.

UNITED STATES PATENT OFFICE.

ROBERT M. LAFFERTY OF TOLEDO, OHIO, ASSIGN OR TO SMITH & LAFFERTY,

OF THREE RIVERS, MICHIGAN. V

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 127,173, dated May 28,1872.

To whom it may concern:

Be it known that I, ROBERT M. LAFFERTY, of Toledo, in the county ofLucas and State of Ohio, have invented a new and useful Improvement inWooden Pumps; and I do declare that the following is a true and accuratedescription thereof, reference being had to the accompanying drawing andto the letters of reference marked thereon and being a part of thisspecification, in which- Figure 1 is an elevation of my improved pumppartially in section, showing a hook-rod engaged with the check-valvefor the purpose of lifting it out of the pump. Fig. 2 is a perspectiveview of the valve. Fig. 3 is a crosssection of the valve chamber andseat. Fig. 4 is a detached perspective view of the ears, in which thelever is pivoted.

Like letters indicate like parts in each figure.

The nature of this invention relates to certain improvements in theconstruction of wooden pumps, having for its object an improved mannerof securing a metallic cylinder in the bore of the pump, and affording ameans of removing the check-valve and its chamber, without being obligedto lift with them the superimposed column of water. The inventionconsists in the peculiar method of securin g a metallic cylinder in thebore of the pump, the said cylinder being inserted from the top; in thepeculiar construction and arrangement of the check-valve and its chamberin such manner that they may be readily removed; and in the peculiarconstruction and arrangement of a pair of cars at the pump-head, whichears serve as a fulcrum for the pump-lever.

In the drawing, A represents the wooden barrel or stock of my pump, andB a metallic cylinder or section of tubing inserted therein from thetop; being arrested at the proper firmly secured in place. The sectionsof wooden tubing are added to the stock, the upper most one beinginserted therein in the usual manner. A piston is reciprocated withinthe cylinder in the usual manner. 0 is a metallic valve-case and seat,tapered at its lower end, and inserted from the top, being arrested by asecond contraction in the bore of said stock below'the lower end ofcylinder 13. D is the valve, whose wings are hooked or flared outwardlyat their lower ends 1), serving to, guide the valve in its movement inthe enlarged part of the case 0 below the seat formed at the topthereof, and which also prevents the valve from being withdrawn entirelyfrom its case. An eyebolt, c, is screwed into the top of the valve,securing the valvedisk to its body.

As it frequently becomes necessary to re move the valve and case ofpumps. of this class, for the purpose of removing obstructions andgrinding them when they have become leaky, by removing the piston, arod, E, having a hook turned at its lower end, is inserted from the topof the pump, and, hooking it into the eyebolt c, the valve and its casemay be readily withdrawn. As soon as the valve has been lifted from itsseat the stock is emptied of the column of water contained therein,thereby obviating the labor of lifting said column of water with thevalve and seat when it is desired to remove them from the pump.

I am aware that a check-valve seat has been heretofore provided with abale, in which a rod might be hooked for the purpose of withdrawing itand the valve from the pump; but when such an arrangement was providedin a deep-well pump it involved the expenditure of a great deal ofpower, owing to the great weight of the column of water which had to belifted with the valve; in many instances necessitating special means toaccomplish the end. At each side of the vertical slot in the pump-head,in which the lever vibrates, I secure a cast-metal ear, F, of the formshown in Fig. 4, having a horizontal socket, d, which receives thefulcrum-pin of the lever. The inner face of each ear is cast with one ormore projecting studs, 6, which are inserted in holes made in thepump-head to receive them, the car being secured to the head by a simplewood-screw at each end. i This arrangement of the studs 6 transmits thestrain of the lever to the purnp-head, while the light castings arecheaper than the brackets heretofore employed as a fulcrum for saidlever.

I am well aware that metallic cylinders inserted in the bore of woodenpumps are not new; but it has always been the practice heretofore toinsert such cylinder from the bottom of the stock, thereby necessitatingthe use of the lower end of the cylinder as a socket to receive thewooden tubing, which frequently resulted in a leaky joint, besidesrendering the construction of the cylinder more costly than mine, owingto the special provision required to be made for the tube-socket.

What I claim as my invention and desire to secure by Letters Patent, is-

1. The combination of the cast-metal fulcrum-ears F, provided with thehorizontal socket d and stud 0, adapted to enter the wood, as describedand shown, with the pumphead A, as described.

2. The pump described, provided with the fulcrum-ears F, head A,metallic cylinder B, valve-case (J, and check-valve D, all constructedand arranged as described, for the purpose set forth.

R. M. LAFFERTY. Witnesses:

HARRY S. SPBAGUE, H. F. EBERrs.

